This came off my 2007 BMW 335i with Navi Logic 7 sound system, everything works 100%, items were removed, placed in my office and now I am finally putting them up for sale.

It is a plug and play wiring harness (technic)

The subwoofer is a Rockford Fosgate 12”, can handle 400 watts rms.

The amp is JL Audio and pushes 360 watts rms.

I sold the car and kept the stereo thinking I would be buying another sedan, however I am looking at coupes and this box only fits the E90.

I spent $300 on the custom box, $100 on the subwoofer, $150 on the JL Audio amp, $85 on the wiring harness.

Asking $500 for the whole package, $550 shipped UPS ground anywhere in USA, $575 shipped with additional insurance up to $600 value.
I will accept a cashier's check, cash in person or check but has to wait 7 days to clear.
There are several other forums members in the Jacksonville, FL that can verify/vouch for me if need be.